[ca680bc5] | 1 | /*===============================================================*\ |
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| 2 | | Project: RTEMS generic MPC5200 BSP | |
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| 3 | +-----------------------------------------------------------------+ |
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| 4 | | Copyright (c) 2005 | |
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| 5 | | Embedded Brains GmbH | |
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| 6 | | Obere Lagerstr. 30 | |
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| 7 | | D-82178 Puchheim | |
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| 8 | | Germany | |
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| 9 | | rtems@embedded-brains.de | |
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| 10 | +-----------------------------------------------------------------+ |
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| 11 | | The license and distribution terms for this file may be | |
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| 12 | | found in the file LICENSE in this distribution or at | |
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| 13 | | | |
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| 14 | | http://www.rtems.com/license/LICENSE. | |
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| 15 | | | |
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| 16 | +-----------------------------------------------------------------+ |
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| 17 | | this file contains the MSCAN driver | |
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| 18 | \*===============================================================*/ |
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| 19 | |
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| 20 | #include <stdio.h> |
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| 21 | #include <stdlib.h> |
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| 22 | #include <rtems.h> |
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| 23 | #include <rtems/error.h> |
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| 24 | #include <rtems/libio.h> |
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| 25 | #include <string.h> |
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[4a4c7900] | 26 | #include "../include/bsp.h" |
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[ca680bc5] | 27 | #include "../irq/irq.h" |
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| 28 | #include "../include/mpc5200.h" |
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[da261595] | 29 | #include "mscan.h" |
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[ca680bc5] | 30 | |
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| 31 | /* #define MSCAN_LOOPBACK */ |
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| 32 | |
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[c9b005a9] | 33 | volatile uint32_t tx_int_wr_count = 0; |
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| 34 | |
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[ca680bc5] | 35 | struct mpc5200_rx_cntrl mpc5200_mscan_rx_cntrl[MPC5200_CAN_NO]; |
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[4a4c7900] | 36 | static struct mscan_channel_info chan_info[MPC5200_CAN_NO]; |
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[c9b005a9] | 37 | |
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| 38 | /* time segmant table */ |
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| 39 | uint8_t can_time_segment_table[CAN_MAX_NO_OF_TQ - MIN_NO_OF_TQ + 1][NO_OF_TABLE_ENTRIES] = { |
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| 40 | |
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| 41 | /* Total no. of time quantas */ /* Time Segment 1*/ /* Time Segment 2 */ /* Sync: Jump width */ |
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| 42 | { 7, 4, 2, 1 }, |
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| 43 | { 8, 5, 2, 1 }, |
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| 44 | { 9, 6, 2, 2 }, |
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| 45 | { 10, 6, 3, 2 }, |
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| 46 | { 11, 7, 3, 2 }, |
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| 47 | { 12, 8, 3, 2 }, |
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| 48 | { 13, 8, 4, 2 }, |
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| 49 | { 14, 9, 4, 2 }, |
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| 50 | { 15, 10, 4, 2 }, |
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| 51 | { 16, 10, 5, 2 }, |
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| 52 | { 17, 11, 5, 2 }, |
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| 53 | { 18, 12, 5, 2 }, |
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| 54 | { 19, 12, 6, 2 }, |
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| 55 | { 20, 13, 6, 2 }, |
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| 56 | { 21, 14, 6, 2 }, |
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| 57 | { 22, 14, 7, 2 }, |
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| 58 | { 23, 15, 7, 2 }, |
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| 59 | { 24, 15, 8, 2 }, |
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| 60 | { 25, 16, 8, 2 }}; |
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| 61 | |
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| 62 | |
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| 63 | /* |
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| 64 | * MPC5x00 MSCAN tx ring buffer function to get a can message buffer from the head of the tx ring buffer |
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| 65 | */ |
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[4a4c7900] | 66 | static struct can_message * get_tx_buffer(struct mscan_channel_info *chan) |
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[c9b005a9] | 67 | { |
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| 68 | /* define a temp. mess ptr. */ |
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[4a4c7900] | 69 | struct can_message * tmp_mess_ptr = NULL, *temp_head_ptr; |
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[c9b005a9] | 70 | |
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| 71 | /* set temp. head pointer */ |
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| 72 | temp_head_ptr = chan->tx_ring_buf.head_ptr; |
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| 73 | |
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| 74 | /* check buffer empty condition */ |
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| 75 | if(temp_head_ptr != chan->tx_ring_buf.tail_ptr) |
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| 76 | { |
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| 77 | |
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| 78 | /* current buffer head. ptr. */ |
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| 79 | tmp_mess_ptr = temp_head_ptr; |
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| 80 | |
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| 81 | /* increment the head pointer */ |
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| 82 | temp_head_ptr++; |
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| 83 | |
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| 84 | /* check for wrap around condition */ |
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| 85 | if(temp_head_ptr > chan->tx_ring_buf.buf_ptr + NO_OF_MSCAN_TX_BUFF) |
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| 86 | { |
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| 87 | |
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| 88 | /* set head ptr. to the begin of the ring buffer */ |
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| 89 | temp_head_ptr = chan->tx_ring_buf.buf_ptr; |
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| 90 | |
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| 91 | } |
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| 92 | |
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| 93 | /* end of crtical section restore head ptr. */ |
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| 94 | chan->tx_ring_buf.head_ptr = temp_head_ptr; |
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| 95 | } |
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| 96 | |
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| 97 | /* return the current head pointer */ |
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| 98 | return tmp_mess_ptr; |
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| 99 | } |
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| 100 | |
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| 101 | /* |
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| 102 | * MPC5x00 MSCAN tx ring buffer function to write a can message buffer to the tail of the tx ring buffer |
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| 103 | */ |
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[4a4c7900] | 104 | static struct can_message * fill_tx_buffer(struct mscan_channel_info *chan, struct can_message * mess_ptr) |
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[c9b005a9] | 105 | { |
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| 106 | /* define a temp. mess ptr. to the entry which follows the current tail entry */ |
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| 107 | struct can_message * tmp_mess_ptr = chan->tx_ring_buf.tail_ptr + 1; |
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| 108 | |
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| 109 | /* check for the wrap around condition */ |
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| 110 | if(tmp_mess_ptr > chan->tx_ring_buf.buf_ptr + NO_OF_MSCAN_TX_BUFF) |
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| 111 | { |
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| 112 | /* set temp. mess. ptr to the begin of the ring buffer */ |
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| 113 | tmp_mess_ptr = chan->tx_ring_buf.buf_ptr; |
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| 114 | } |
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| 115 | |
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| 116 | /* check buffer full condition */ |
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| 117 | if(tmp_mess_ptr == chan->tx_ring_buf.head_ptr) |
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| 118 | { |
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| 119 | /* return NULL in case buffer is full */ |
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| 120 | return NULL; |
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| 121 | } |
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| 122 | else |
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| 123 | { |
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| 124 | /* copy the can mess. to the tail of the buffer */ |
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| 125 | memcpy((void *)chan->tx_ring_buf.tail_ptr, (void *)mess_ptr, sizeof(struct can_message)); |
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| 126 | |
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| 127 | /* set new tail equal to temp. mess. ptr. */ |
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| 128 | chan->tx_ring_buf.tail_ptr = tmp_mess_ptr; |
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| 129 | } |
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| 130 | |
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| 131 | /* return the actual tail ptr. (next free entry) */ |
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| 132 | return chan->tx_ring_buf.tail_ptr; |
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| 133 | } |
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[ca680bc5] | 134 | |
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| 135 | /* |
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| 136 | * MPC5x00 MSCAN interrupt handler |
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| 137 | */ |
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| 138 | static void mpc5200_mscan_interrupt_handler(rtems_irq_hdl_param handle) |
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| 139 | { |
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| 140 | rtems_status_code status; |
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| 141 | mscan_handle *mscan_hdl = (mscan_handle *)handle; |
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| 142 | struct mscan_channel_info *chan = &chan_info[mscan_hdl->mscan_channel]; |
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[c9b005a9] | 143 | struct can_message rx_mess, *rx_mess_ptr, *tx_mess_ptr; |
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[ca680bc5] | 144 | volatile struct mpc5200_mscan *mscan = chan->regs; |
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[c9b005a9] | 145 | register uint8_t idx; |
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[ca680bc5] | 146 | |
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| 147 | /* |
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[c9b005a9] | 148 | handle tx ring buffer |
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[ca680bc5] | 149 | */ |
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| 150 | |
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[c9b005a9] | 151 | /* loop over all 3 tx buffers */ |
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| 152 | for(idx = TFLG_TXE0; idx <= TFLG_TXE2; idx=idx<<1) |
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| 153 | { |
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| 154 | |
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| 155 | /* check for tx buffer vacation */ |
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| 156 | if((mscan->tflg) & idx) |
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| 157 | { |
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| 158 | |
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| 159 | /* try to get a message */ |
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| 160 | tx_mess_ptr = get_tx_buffer(chan); |
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| 161 | |
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| 162 | /* check for new tx message */ |
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| 163 | if(tx_mess_ptr != NULL) |
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| 164 | { |
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| 165 | |
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| 166 | /* select the tx buffer */ |
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| 167 | mscan->bsel = idx; |
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| 168 | |
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| 169 | /* check for toucan interface */ |
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| 170 | if((mscan_hdl->toucan_callback) == NULL) |
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| 171 | { |
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| 172 | |
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| 173 | /* set tx id */ |
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| 174 | mscan->txidr0 = SET_IDR0(tx_mess_ptr->mess_id); |
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| 175 | mscan->txidr1 = SET_IDR1(tx_mess_ptr->mess_id); |
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| 176 | mscan->txidr2 = 0; |
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| 177 | mscan->txidr3 = 0; |
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| 178 | |
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| 179 | /* insert dlc into mscan register */ |
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| 180 | mscan->txdlr = (uint8_t)((tx_mess_ptr->mess_len) & 0x000F); |
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| 181 | } |
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| 182 | |
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| 183 | /* select one free tx buffer if TOUCAN not registered) */ |
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| 184 | if(((mscan_hdl->toucan_callback) == NULL) || (((mscan_hdl->toucan_callback) != NULL) && ((tx_mess_ptr->toucan_tx_id) == idx))) |
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| 185 | { |
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| 186 | |
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| 187 | /* set tx id */ |
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| 188 | mscan->txidr0 = SET_IDR0(tx_mess_ptr->mess_id); |
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| 189 | mscan->txidr1 = SET_IDR1(tx_mess_ptr->mess_id); |
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| 190 | mscan->txidr2 = 0; |
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| 191 | mscan->txidr3 = 0; |
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| 192 | |
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| 193 | /* insert dlc into mscan register */ |
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| 194 | mscan->txdlr = (uint8_t)((tx_mess_ptr->mess_len) & 0x000F); |
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| 195 | |
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| 196 | /* copy tx data to MSCAN registers */ |
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| 197 | switch(mscan->txdlr) |
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| 198 | { |
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| 199 | case 8: |
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| 200 | mscan->txdsr7 = tx_mess_ptr->mess_data[7]; |
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| 201 | case 7: |
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| 202 | mscan->txdsr6 = tx_mess_ptr->mess_data[6]; |
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| 203 | case 6: |
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| 204 | mscan->txdsr5 = tx_mess_ptr->mess_data[5]; |
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| 205 | case 5: |
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| 206 | mscan->txdsr4 = tx_mess_ptr->mess_data[4]; |
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| 207 | case 4: |
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| 208 | mscan->txdsr3 = tx_mess_ptr->mess_data[3]; |
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| 209 | case 3: |
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| 210 | mscan->txdsr2 = tx_mess_ptr->mess_data[2]; |
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| 211 | case 2: |
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| 212 | mscan->txdsr1 = tx_mess_ptr->mess_data[1]; |
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| 213 | case 1: |
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| 214 | mscan->txdsr0 = tx_mess_ptr->mess_data[0]; |
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| 215 | break; |
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| 216 | default: |
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| 217 | break; |
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| 218 | } |
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| 219 | |
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| 220 | /* enable message buffer specific interrupt */ |
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| 221 | mscan->tier |= mscan->bsel; |
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| 222 | |
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| 223 | /* start transfer */ |
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| 224 | mscan->tflg = mscan->bsel; |
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| 225 | |
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| 226 | /* release counting semaphore of tx ring buffer */ |
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| 227 | rtems_semaphore_release((rtems_id)(chan->tx_rb_sid)); |
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| 228 | |
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| 229 | tx_int_wr_count++; |
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[ca680bc5] | 230 | |
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[c9b005a9] | 231 | } |
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| 232 | else |
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| 233 | { |
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[ca680bc5] | 234 | |
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[c9b005a9] | 235 | /* refill the tx ring buffer with the message */ |
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| 236 | fill_tx_buffer(chan, tx_mess_ptr); |
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| 237 | |
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| 238 | } |
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| 239 | } |
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| 240 | else |
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| 241 | { |
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| 242 | /* reset interrupt enable bit */ |
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| 243 | mscan->tier &= ~(idx); |
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| 244 | } |
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| 245 | } |
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| 246 | } |
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[ca680bc5] | 247 | |
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| 248 | /* |
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| 249 | handle rx interrupts |
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| 250 | */ |
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| 251 | |
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| 252 | /* check for rx interrupt source */ |
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| 253 | if(mscan->rier & RIER_RXFIE) |
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| 254 | { |
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| 255 | |
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| 256 | /* can messages received ? */ |
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| 257 | while(mscan->rflg & RFLG_RXF) |
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| 258 | { |
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| 259 | |
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| 260 | if(mscan_hdl->toucan_callback == NULL) |
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| 261 | { |
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| 262 | |
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| 263 | /* select temporary rx buffer */ |
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| 264 | rx_mess_ptr = &rx_mess; |
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| 265 | |
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| 266 | } |
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| 267 | else |
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| 268 | { |
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| 269 | |
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| 270 | /* check the rx fliter-match indicators (16-bit filter mode) */ |
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| 271 | /* in case of more than one hit, lower hit has priority */ |
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[c9b005a9] | 272 | idx = (mscan->idac) & 0x7; |
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| 273 | switch(idx) |
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[ca680bc5] | 274 | { |
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| 275 | |
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| 276 | case 0: |
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[c9b005a9] | 277 | case 1: |
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[ca680bc5] | 278 | case 2: |
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[c9b005a9] | 279 | case 3: |
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| 280 | rx_mess_ptr = |
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| 281 | (struct can_message *)&(mpc5200_mscan_rx_cntrl[mscan_hdl->mscan_channel].can_rx_message[idx]); |
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| 282 | break; |
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[ca680bc5] | 283 | |
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| 284 | /* this case should never happen */ |
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| 285 | default: |
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| 286 | /* reset the rx indication flag */ |
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| 287 | mscan->rflg |= RFLG_RXF; |
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| 288 | |
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| 289 | return; |
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| 290 | break; |
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| 291 | } |
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| 292 | |
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| 293 | } |
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| 294 | |
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| 295 | /* get rx ID */ |
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| 296 | rx_mess_ptr->mess_id = GET_IDR0(mscan->rxidr0) | GET_IDR1(mscan->rxidr1); |
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| 297 | |
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| 298 | /* get rx len */ |
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| 299 | rx_mess_ptr->mess_len = ((mscan->rxdlr) & 0x0F); |
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| 300 | |
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| 301 | /* get time stamp */ |
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| 302 | rx_mess_ptr->mess_time_stamp = ((mscan->rxtimh << 8) | (mscan->rxtiml)); |
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| 303 | |
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| 304 | /* get the data */ |
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| 305 | switch(rx_mess_ptr->mess_len) |
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| 306 | { |
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| 307 | |
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| 308 | case 8: |
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| 309 | rx_mess_ptr->mess_data[7] = mscan->rxdsr7; |
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| 310 | case 7: |
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| 311 | rx_mess_ptr->mess_data[6] = mscan->rxdsr6; |
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| 312 | case 6: |
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| 313 | rx_mess_ptr->mess_data[5] = mscan->rxdsr5; |
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| 314 | case 5: |
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| 315 | rx_mess_ptr->mess_data[4] = mscan->rxdsr4; |
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| 316 | case 4: |
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| 317 | rx_mess_ptr->mess_data[3] = mscan->rxdsr3; |
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| 318 | case 3: |
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| 319 | rx_mess_ptr->mess_data[2] = mscan->rxdsr2; |
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| 320 | case 2: |
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| 321 | rx_mess_ptr->mess_data[1] = mscan->rxdsr1; |
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| 322 | case 1: |
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| 323 | rx_mess_ptr->mess_data[0] = mscan->rxdsr0; |
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| 324 | case 0: |
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| 325 | default: |
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| 326 | break; |
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| 327 | |
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| 328 | } |
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| 329 | |
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| 330 | if(mscan_hdl->toucan_callback == NULL) |
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| 331 | { |
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| 332 | |
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| 333 | if((status = rtems_message_queue_send(chan->rx_qid, (void *)rx_mess_ptr, sizeof(struct can_message))) != RTEMS_SUCCESSFUL) |
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| 334 | { |
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| 335 | |
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| 336 | chan->int_rx_err++; |
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| 337 | |
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| 338 | } |
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| 339 | |
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| 340 | } |
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| 341 | else |
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| 342 | { |
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| 343 | |
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| 344 | mscan_hdl->toucan_callback((int16_t)(((mscan->idac) & 0x7) + 3)); |
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| 345 | |
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| 346 | } |
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| 347 | |
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| 348 | /* reset the rx indication flag */ |
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| 349 | mscan->rflg |= RFLG_RXF; |
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| 350 | |
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| 351 | } /* end of while(mscan->rflg & RFLG_RXF) */ |
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| 352 | |
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| 353 | } |
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| 354 | |
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| 355 | /* status change detected */ |
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| 356 | if(mscan->rflg & RFLG_CSCIF) |
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| 357 | { |
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| 358 | |
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| 359 | mscan->rflg |= RFLG_CSCIF; |
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| 360 | |
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| 361 | if(mscan_hdl->toucan_callback != NULL) |
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| 362 | { |
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| 363 | |
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| 364 | mscan_hdl->toucan_callback((int16_t)(-1)); |
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| 365 | |
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| 366 | } |
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| 367 | |
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| 368 | } |
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| 369 | |
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| 370 | } |
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| 371 | |
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| 372 | |
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| 373 | /* |
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| 374 | * Disable MSCAN ints. |
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| 375 | */ |
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| 376 | void mpc5200_mscan_int_disable(volatile struct mpc5200_mscan *mscan) |
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| 377 | { |
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| 378 | |
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| 379 | /* RX Interrupt Enable on MSCAN_A/_B -----------------------------*/ |
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| 380 | /* [07]:WUPIE 0 : WakeUp interrupt disabled */ |
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| 381 | /* [06]:CSCIE 0 : Status Change interrupt disabled */ |
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| 382 | /* [05]:RSTATE1 0 : Recv. Status Change int. ,Bit 1 */ |
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| 383 | /* [04]:RSTATE0 0 : Recv. Status Change int. ,Bit 0 */ |
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| 384 | /* -> 00 rx status change int. disabled */ |
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| 385 | /* [03]:TSTAT1 0 : Transmit. Status Change int. , Bit 1 */ |
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| 386 | /* [02]:TSTAT0 0 : Transmit. Status Change int. , Bit 0 */ |
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| 387 | /* -> 00 tx status change int. disabled */ |
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| 388 | /* [01]:OVRIE 0 : Overrun Interrupt is disabled */ |
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| 389 | /* [00]:RXFIE 0 : Recv. Full interrupt is disabled */ |
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| 390 | mscan->rier &= ~(RIER_CSCIE | RIER_RXFIE); |
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| 391 | |
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| 392 | /* TX Interrupt Enable on MSCAN_A/_B -----------------------------*/ |
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| 393 | /* [07]:res. 0 : reserved */ |
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| 394 | /* [06]:res. 0 : reserved */ |
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| 395 | /* [05]:res. 0 : reserved */ |
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| 396 | /* [04]:res. 0 : reserved */ |
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| 397 | /* [03]:res. 0 : reserved */ |
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| 398 | /* [02]:TSEG12 0 : TX2message buffer int. is disabled */ |
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| 399 | /* [01]:TSEG11 0 : TX1 message buffer int. is disabled */ |
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| 400 | /* [00]:TSEG10 0 : TX0 message buffer int. is disabled */ |
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| 401 | mscan->tier &= ~(TIER_TXEI2 | TIER_TXEI1 | TIER_TXEI0); |
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| 402 | |
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| 403 | return; |
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| 404 | |
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| 405 | } |
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| 406 | |
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| 407 | |
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| 408 | /* |
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| 409 | * Enable MSCAN ints. |
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| 410 | */ |
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| 411 | void mpc5200_mscan_int_enable(volatile struct mpc5200_mscan *mscan) |
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| 412 | { |
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| 413 | |
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| 414 | /* RX Interrupt Enable on MSCAN_A/_B -----------------------------*/ |
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| 415 | /* [07]:WUPIE 0 : WakeUp interrupt disabled */ |
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| 416 | /* [06]:CSCIE 1 : Status Change interrupt enabled */ |
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| 417 | /* [05]:RSTATE1 0 : Recv. Status Change int. ,Bit 1 */ |
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| 418 | /* [04]:RSTATE0 1 : Recv. Status Change int. ,Bit 0 */ |
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| 419 | /* -> 01 BusOff status changes enabled */ |
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| 420 | /* [03]:TSTAT1 0 : Transmit. Status Change int. , Bit 1 */ |
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| 421 | /* [02]:TSTAT0 1 : Transmit. Status Change int. , Bit 0 */ |
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| 422 | /* -> 01 BusOff status changes enabled */ |
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| 423 | /* [01]:OVRIE 0 : Overrun Interrupt is disabled */ |
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| 424 | /* [00]:RXFIE 1 : Recv. Full interrupt is enabled */ |
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| 425 | mscan->rier |= (RIER_CSCIE | RIER_RXFIE | RIER_RSTAT(1) | RIER_TSTAT(1)); |
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| 426 | |
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| 427 | return; |
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| 428 | |
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| 429 | } |
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| 430 | |
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| 431 | /* |
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| 432 | * Unmask MPC5x00 MSCAN_A interrupts |
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| 433 | */ |
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| 434 | void mpc5200_mscan_a_on(const rtems_irq_connect_data* ptr) |
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| 435 | { |
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| 436 | volatile struct mpc5200_mscan *mscan = (&chan_info[MSCAN_A])->regs; |
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| 437 | |
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| 438 | mpc5200_mscan_int_enable(mscan); |
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| 439 | |
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| 440 | return; |
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| 441 | |
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| 442 | } |
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| 443 | |
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| 444 | |
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| 445 | /* |
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| 446 | * Mask MPC5x00 MSCAN_A interrupts |
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| 447 | */ |
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| 448 | void mpc5200_mscan_a_off(const rtems_irq_connect_data* ptr) |
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| 449 | { |
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| 450 | volatile struct mpc5200_mscan *mscan = (&chan_info[MSCAN_A])->regs; |
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| 451 | |
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| 452 | mpc5200_mscan_int_disable(mscan); |
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| 453 | |
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| 454 | return; |
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| 455 | |
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| 456 | } |
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| 457 | |
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| 458 | |
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| 459 | /* |
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| 460 | * Get MSCAN_A interrupt mask setting |
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| 461 | */ |
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| 462 | int mpc5200_mscan_a_isOn(const rtems_irq_connect_data* ptr) |
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| 463 | { |
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| 464 | volatile struct mpc5200_mscan *mscan = (&chan_info[MSCAN_A])->regs; |
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| 465 | |
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| 466 | if((mscan->rier & RIER_CSCIE) && (mscan->rier & RIER_RXFIE)) |
---|
| 467 | return RTEMS_SUCCESSFUL; |
---|
| 468 | else |
---|
| 469 | return RTEMS_UNSATISFIED; |
---|
| 470 | |
---|
| 471 | return RTEMS_SUCCESSFUL; |
---|
| 472 | |
---|
| 473 | } |
---|
| 474 | |
---|
| 475 | |
---|
| 476 | /* |
---|
| 477 | * Unmask MPC5x00 MSCAN_B interrupts |
---|
| 478 | */ |
---|
| 479 | void mpc5200_mscan_b_on(const rtems_irq_connect_data* ptr) |
---|
| 480 | { |
---|
| 481 | volatile struct mpc5200_mscan *mscan = (&chan_info[MSCAN_B])->regs; |
---|
| 482 | |
---|
| 483 | mpc5200_mscan_int_enable(mscan); |
---|
| 484 | |
---|
| 485 | return; |
---|
| 486 | |
---|
| 487 | } |
---|
| 488 | |
---|
| 489 | |
---|
| 490 | /* |
---|
| 491 | * Mask MPC5x00 MSCAN_B interrupts |
---|
| 492 | */ |
---|
| 493 | void mpc5200_mscan_b_off(const rtems_irq_connect_data* ptr) |
---|
| 494 | { |
---|
| 495 | volatile struct mpc5200_mscan *mscan = (&chan_info[MSCAN_B])->regs; |
---|
| 496 | |
---|
| 497 | mpc5200_mscan_int_disable(mscan); |
---|
| 498 | |
---|
| 499 | return; |
---|
| 500 | |
---|
| 501 | } |
---|
| 502 | |
---|
| 503 | |
---|
| 504 | /* |
---|
| 505 | * Get MSCAN_B interrupt mask setting |
---|
| 506 | */ |
---|
| 507 | int mpc5200_mscan_b_isOn(const rtems_irq_connect_data* ptr) |
---|
| 508 | { |
---|
| 509 | volatile struct mpc5200_mscan *mscan = (&chan_info[MSCAN_B])->regs; |
---|
| 510 | |
---|
| 511 | if((mscan->rier & RIER_CSCIE) && (mscan->rier & RIER_RXFIE)) |
---|
| 512 | return RTEMS_SUCCESSFUL; |
---|
| 513 | else |
---|
| 514 | return RTEMS_UNSATISFIED; |
---|
| 515 | |
---|
| 516 | return RTEMS_SUCCESSFUL; |
---|
| 517 | |
---|
| 518 | } |
---|
| 519 | |
---|
| 520 | static mscan_handle mscan_a_handle = |
---|
| 521 | { |
---|
| 522 | MSCAN_A, |
---|
| 523 | NULL |
---|
| 524 | }; |
---|
| 525 | |
---|
| 526 | |
---|
| 527 | static mscan_handle mscan_b_handle = |
---|
| 528 | { |
---|
| 529 | MSCAN_B, |
---|
| 530 | NULL |
---|
| 531 | }; |
---|
| 532 | |
---|
| 533 | /* |
---|
| 534 | * MPC5x00 MSCAN_A/_B irq data |
---|
| 535 | */ |
---|
| 536 | static rtems_irq_connect_data mpc5200_mscan_irq_data[MPC5200_CAN_NO] = |
---|
| 537 | {{ |
---|
| 538 | BSP_SIU_IRQ_MSCAN1, |
---|
| 539 | (rtems_irq_hdl) mpc5200_mscan_interrupt_handler, |
---|
| 540 | (rtems_irq_hdl_param) &mscan_a_handle, |
---|
| 541 | (rtems_irq_enable) mpc5200_mscan_a_on, |
---|
| 542 | (rtems_irq_disable) mpc5200_mscan_a_off, |
---|
| 543 | (rtems_irq_is_enabled) mpc5200_mscan_a_isOn |
---|
| 544 | }, |
---|
| 545 | { |
---|
| 546 | BSP_SIU_IRQ_MSCAN2, |
---|
| 547 | (rtems_irq_hdl) mpc5200_mscan_interrupt_handler, |
---|
| 548 | (rtems_irq_hdl_param) &mscan_b_handle, |
---|
| 549 | (rtems_irq_enable) mpc5200_mscan_b_on, |
---|
| 550 | (rtems_irq_disable) mpc5200_mscan_b_off, |
---|
| 551 | (rtems_irq_is_enabled) mpc5200_mscan_b_isOn |
---|
| 552 | }}; |
---|
| 553 | |
---|
| 554 | |
---|
| 555 | /* |
---|
| 556 | * Enter MSCAN sleep mode |
---|
| 557 | */ |
---|
| 558 | void mpc5200_mscan_enter_sleep_mode(volatile struct mpc5200_mscan *mscan) |
---|
| 559 | { |
---|
| 560 | |
---|
| 561 | /* Control Register 0 --------------------------------------------*/ |
---|
| 562 | /* [07]:RXFRM 0 : Recv. Frame, Flag Bit (rd.&clear only) */ |
---|
| 563 | /* [06]:RXACT 0 : Recv. Active, Status Bit (rd. only) */ |
---|
| 564 | /* [05]:CSWAI 0 : CAN Stops in Wait Mode */ |
---|
| 565 | /* [04]:SYNCH 0 : Synchronized, Status Bit (rd. only) */ |
---|
| 566 | /* [03]:TIME 1 : Generate Timestamps */ |
---|
| 567 | /* [02]:WUPE 1 : WakeUp Enabled */ |
---|
| 568 | /* [01]:SLPRQ 0->1 : Sleep Mode Request */ |
---|
| 569 | /* [00]:INITRQ 0 : No init. Mode Request */ |
---|
| 570 | /* select sleep mode */ |
---|
| 571 | mscan->ctl0 |= (CTL0_SLPRQ); |
---|
| 572 | |
---|
| 573 | /* Control Register 1 --------------------------------------------*/ |
---|
| 574 | /* [07]:CANE 0 : MSCAN Module is disabled */ |
---|
| 575 | /* [06]:CLKSRC 1 : Clock Source -> IPB-Clock (33 MHz) */ |
---|
| 576 | /* [05]:LOOPB 0 : No Loopback */ |
---|
| 577 | /* [04]:LISTEN 0 : Normal Operation */ |
---|
| 578 | /* [03]:res 0 : reserved */ |
---|
| 579 | /* [02]:WUPM 0 : No protect. from spurious WakeUp */ |
---|
| 580 | /* [01]:SLPAK 0->1 : Sleep Mode Acknowledge (rd. only) */ |
---|
| 581 | /* [00]:INITAK 0 : Init. Mode Acknowledge (rd. only) */ |
---|
| 582 | /* wait for sleep mode acknowledge */ |
---|
| 583 | while(!(mscan->ctl1 & CTL1_SLPAK)); |
---|
| 584 | |
---|
| 585 | return; |
---|
| 586 | |
---|
| 587 | } |
---|
| 588 | |
---|
| 589 | |
---|
| 590 | /* |
---|
| 591 | * Exit MSCAN sleep mode |
---|
| 592 | */ |
---|
| 593 | void mpc5200_mscan_exit_sleep_mode(volatile struct mpc5200_mscan *mscan) |
---|
| 594 | { |
---|
| 595 | |
---|
| 596 | /* Control Register 0 --------------------------------------------*/ |
---|
| 597 | /* [07]:RXFRM 0 : Recv. Frame, Flag Bit (rd.&clear only) */ |
---|
| 598 | /* [06]:RXACT 0 : Recv. Active, Status Bit (rd. only) */ |
---|
| 599 | /* [05]:CSWAI 0 : CAN Stops in Wait Mode */ |
---|
| 600 | /* [04]:SYNCH 0 : Synchronized, Status Bit (rd. only) */ |
---|
| 601 | /* [03]:TIME 1 : Generate Timestamps */ |
---|
| 602 | /* [02]:WUPE 1 : WakeUp Enabled */ |
---|
| 603 | /* [01]:SLPRQ 0->1 : Sleep Mode Request */ |
---|
| 604 | /* [00]:INITRQ 0 : No init. Mode Request */ |
---|
| 605 | /* select sleep mode */ |
---|
| 606 | mscan->ctl0 &= ~(CTL0_SLPRQ); |
---|
| 607 | |
---|
| 608 | /* Control Register 1 --------------------------------------------*/ |
---|
| 609 | /* [07]:CANE 0 : MSCAN Module is disabled */ |
---|
| 610 | /* [06]:CLKSRC 1 : Clock Source -> IPB-Clock (33 MHz) */ |
---|
| 611 | /* [05]:LOOPB 0 : No Loopback */ |
---|
| 612 | /* [04]:LISTEN 0 : Normal Operation */ |
---|
| 613 | /* [03]:res 0 : reserved */ |
---|
| 614 | /* [02]:WUPM 0 : No protect. from spurious WakeUp */ |
---|
| 615 | /* [01]:SLPAK 0->1 : Sleep Mode Acknowledge (rd. only) */ |
---|
| 616 | /* [00]:INITAK 0 : Init. Mode Acknowledge (rd. only) */ |
---|
| 617 | /* wait for sleep mode acknowledge */ |
---|
| 618 | while((mscan->ctl1 & CTL1_SLPAK)); |
---|
| 619 | |
---|
| 620 | return; |
---|
| 621 | |
---|
| 622 | } |
---|
| 623 | |
---|
| 624 | |
---|
| 625 | /* |
---|
| 626 | * Enter MSCAN init mode and disconnect from bus |
---|
| 627 | */ |
---|
| 628 | void mpc5200_mscan_enter_init_mode(volatile struct mpc5200_mscan *mscan) |
---|
| 629 | { |
---|
| 630 | |
---|
| 631 | /* Control Register 0 --------------------------------------------*/ |
---|
| 632 | /* [07]:RXFRM 0 : Recv. Frame, Flag Bit (rd.&clear only) */ |
---|
| 633 | /* [06]:RXACT 0 : Recv. Active, Status Bit (rd. only) */ |
---|
| 634 | /* [05]:CSWAI 0 : CAN Stops in Wait Mode */ |
---|
| 635 | /* [04]:SYNCH 0 : Synchronized, Status Bit (rd. only) */ |
---|
| 636 | /* [03]:TIME 1 : Generate Timestamps */ |
---|
| 637 | /* [02]:WUPE 0 : WakeUp disabled */ |
---|
| 638 | /* [01]:SLPRQ 0 : No Sleep Mode Request */ |
---|
| 639 | /* [00]:INITRQ 0->1 : Init. Mode Request */ |
---|
| 640 | /* select init mode */ |
---|
| 641 | mscan->ctl0 |= (CTL0_INITRQ); |
---|
| 642 | |
---|
| 643 | /* Control Register 1 --------------------------------------------*/ |
---|
| 644 | /* [07]:CANE 0 : MSCAN Module is disabled */ |
---|
| 645 | /* [06]:CLKSRC 1 : Clock Source -> IPB-Clock (33 MHz) */ |
---|
| 646 | /* [05]:LOOPB 0 : No Loopback */ |
---|
| 647 | /* [04]:LISTEN 0 : Normal Operation */ |
---|
| 648 | /* [03]:res 0 : reserved */ |
---|
| 649 | /* [02]:WUPM 0 : No protect. from spurious WakeUp */ |
---|
| 650 | /* [01]:SLPAK 0 : Sleep Mode Acknowledge (rd. only) */ |
---|
| 651 | /* [00]:INITAK 0->1 : Init. Mode Acknowledge (rd. only) */ |
---|
| 652 | /* wait for init mode acknowledge */ |
---|
| 653 | while(!(mscan->ctl1 & CTL1_INITAK)); |
---|
| 654 | |
---|
| 655 | return; |
---|
| 656 | |
---|
| 657 | } |
---|
| 658 | |
---|
| 659 | |
---|
| 660 | /* |
---|
| 661 | * Exit MSCAN init mode |
---|
| 662 | */ |
---|
| 663 | void mpc5200_mscan_exit_init_mode(volatile struct mpc5200_mscan *mscan) |
---|
| 664 | { |
---|
| 665 | |
---|
| 666 | /* Control Register 0 --------------------------------------------*/ |
---|
| 667 | /* [07]:RXFRM 0 : Recv. Frame, Flag Bit (rd.&clear only) */ |
---|
| 668 | /* [06]:RXACT 0 : Recv. Active, Status Bit (rd. only) */ |
---|
| 669 | /* [05]:CSWAI 0 : CAN Stops in Wait Mode */ |
---|
| 670 | /* [04]:SYNCH 0 : Synchronized, Status Bit (rd. only) */ |
---|
| 671 | /* [03]:TIME 1 : Generate Timestamps */ |
---|
| 672 | /* [02]:WUPE 0 : WakeUp Disabled */ |
---|
| 673 | /* [01]:SLPRQ 0 : No Sleep Mode Request */ |
---|
| 674 | /* [00]:INITRQ 1->0 : Init. Mode Request */ |
---|
| 675 | /* select normal mode */ |
---|
| 676 | mscan->ctl0 &= ~(CTL0_INITRQ); |
---|
| 677 | |
---|
| 678 | /* Control Register 1 --------------------------------------------*/ |
---|
| 679 | /* [07]:CANE 0 : MSCAN Module is disabled */ |
---|
| 680 | /* [06]:CLKSRC 1 : Clock Source -> IPB-Clock (33 MHz) */ |
---|
| 681 | /* [05]:LOOPB 0 : No Loopback */ |
---|
| 682 | /* [04]:LISTEN 0 : Normal Operation */ |
---|
| 683 | /* [03]:res 0 : reserved */ |
---|
| 684 | /* [02]:WUPM 0 : No protect. from spurious WakeUp */ |
---|
| 685 | /* [01]:SLPAK 0 : Sleep Mode Acknowledge (rd. only) */ |
---|
| 686 | /* [00]:INITAK 1->0 : Init. Mode Acknowledge (rd. only) */ |
---|
| 687 | /* wait for normal mode acknowledge */ |
---|
| 688 | while(mscan->ctl1 & CTL1_INITAK); |
---|
| 689 | |
---|
| 690 | return; |
---|
| 691 | |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | |
---|
| 695 | /* |
---|
| 696 | * MPC5x00 MSCAN wait for sync. with CAN bus |
---|
| 697 | */ |
---|
| 698 | void mpc5200_mscan_wait_sync(volatile struct mpc5200_mscan *mscan) |
---|
| 699 | { |
---|
| 700 | |
---|
| 701 | /* Control Register 0 --------------------------------------------*/ |
---|
| 702 | /* [07]:RXFRM 0 : Recv. Frame, Flag Bit (rd.&clear only) */ |
---|
| 703 | /* [06]:RXACT 0 : Recv. Active, Status Bit (rd. only) */ |
---|
| 704 | /* [05]:CSWAI 0 : CAN Stops in Wait Mode */ |
---|
| 705 | /* [04]:SYNCH 0->1 : Synchronized, Status Bit (rd. only) */ |
---|
| 706 | /* [03]:TIME 1 : Generate Timestamps */ |
---|
| 707 | /* [02]:WUPE 0 : WakeUp Disabled */ |
---|
| 708 | /* [01]:SLPRQ 0 : No Sleep Mode Request */ |
---|
| 709 | /* [00]:INITRQ 0 : No init. Mode Request */ |
---|
| 710 | /* wait for MSCAN A_/_B bus synch. */ |
---|
| 711 | |
---|
[c9b005a9] | 712 | #if 0 /* we don't have a need to wait for sync. */ |
---|
| 713 | while(!((mscan->ctl0) & CTL0_SYNCH)); |
---|
| 714 | #endif |
---|
[ca680bc5] | 715 | return; |
---|
| 716 | |
---|
| 717 | } |
---|
| 718 | |
---|
[c9b005a9] | 719 | /* calculate the can clock prescaler value */ |
---|
| 720 | uint8_t prescaler_calculation(uint32_t can_bit_rate, uint32_t can_clock_frq, uint8_t *tq_no) { |
---|
| 721 | |
---|
| 722 | /* local variables */ |
---|
[4a4c7900] | 723 | uint8_t presc_val, tq_no_dev_min = 0; |
---|
| 724 | uint32_t bit_rate, bit_rate_dev, frq_tq, bit_rate_dev_min = 0xFFFFFFFF; |
---|
[c9b005a9] | 725 | |
---|
| 726 | /* loop through all values of time quantas */ |
---|
| 727 | for(*tq_no = CAN_MAX_NO_OF_TQ; *tq_no >= MIN_NO_OF_TQ; (*tq_no)--) { |
---|
| 728 | |
---|
| 729 | /* calculate time quanta freq. */ |
---|
| 730 | frq_tq = *tq_no * can_bit_rate; |
---|
| 731 | |
---|
[4a4c7900] | 732 | /* calculate the optimized prescal. val. */ |
---|
| 733 | presc_val = (can_clock_frq+frq_tq/2)/frq_tq; |
---|
| 734 | |
---|
| 735 | /* calculate the bitrate */ |
---|
| 736 | bit_rate = can_clock_frq/(*tq_no * presc_val); |
---|
| 737 | |
---|
| 738 | /* calculate the bitrate deviation */ |
---|
| 739 | if(can_bit_rate >= bit_rate) |
---|
| 740 | { |
---|
| 741 | /* calculate the bitrate deviation */ |
---|
| 742 | bit_rate_dev = can_bit_rate - bit_rate; |
---|
| 743 | } |
---|
| 744 | else |
---|
| 745 | { |
---|
| 746 | /* calculate the bitrate deviation */ |
---|
| 747 | bit_rate_dev = bit_rate - can_bit_rate; |
---|
| 748 | } |
---|
[c9b005a9] | 749 | |
---|
| 750 | /* check the deviation freq. */ |
---|
[4a4c7900] | 751 | if(bit_rate_dev == 0) { |
---|
[c9b005a9] | 752 | |
---|
| 753 | /* return if best match (zero deviation) */ |
---|
[4a4c7900] | 754 | return (uint8_t)(presc_val); |
---|
[c9b005a9] | 755 | } |
---|
| 756 | else |
---|
| 757 | { |
---|
| 758 | |
---|
[4a4c7900] | 759 | /* check for minimum of bit rate deviation */ |
---|
| 760 | if(bit_rate_dev < bit_rate_dev_min) { |
---|
[c9b005a9] | 761 | |
---|
| 762 | /* recognize the minimum freq. deviation */ |
---|
[4a4c7900] | 763 | bit_rate_dev_min = bit_rate_dev; |
---|
[c9b005a9] | 764 | |
---|
| 765 | /* recognize the no. of time quantas */ |
---|
[4a4c7900] | 766 | tq_no_dev_min = *tq_no; |
---|
[c9b005a9] | 767 | } |
---|
| 768 | } |
---|
| 769 | } |
---|
| 770 | |
---|
[4a4c7900] | 771 | /* get the no of tq's */ |
---|
| 772 | *tq_no = tq_no_dev_min; |
---|
| 773 | |
---|
| 774 | /* calculate time quanta freq. */ |
---|
| 775 | frq_tq = *tq_no * can_bit_rate; |
---|
| 776 | |
---|
| 777 | /* return the optimized prescaler value */ |
---|
| 778 | return (uint8_t)((can_clock_frq+frq_tq/2)/frq_tq); |
---|
[c9b005a9] | 779 | } |
---|
[ca680bc5] | 780 | |
---|
| 781 | /* |
---|
| 782 | * MPC5x00 MSCAN set up the bit timing |
---|
| 783 | */ |
---|
[c9b005a9] | 784 | void mpc5200_mscan_perform_bit_time_settings(volatile struct mpc5200_mscan *mscan, uint32_t can_bit_rate, uint32_t can_clock_frq) |
---|
[ca680bc5] | 785 | { |
---|
| 786 | uint32_t prescale_val = 0; |
---|
[c9b005a9] | 787 | uint8_t tq_no, tseg_1, tseg_2, sseg; |
---|
| 788 | |
---|
| 789 | /* get optimized prescaler value */ |
---|
| 790 | prescale_val = prescaler_calculation(can_bit_rate, can_clock_frq, &tq_no); |
---|
| 791 | |
---|
| 792 | /* get time segment length from time segment table */ |
---|
| 793 | tseg_1 = can_time_segment_table[tq_no - MIN_NO_OF_TQ][TSEG_1]; |
---|
| 794 | tseg_2 = can_time_segment_table[tq_no - MIN_NO_OF_TQ][TSEG_2]; |
---|
| 795 | sseg = can_time_segment_table[tq_no - MIN_NO_OF_TQ][SJW]; |
---|
[ca680bc5] | 796 | |
---|
| 797 | /* Bus Timing Register 0 MSCAN_A/_B ------------------------------*/ |
---|
| 798 | /* [07]:SJW1 1 : Synchronization jump width, Bit1 */ |
---|
| 799 | /* [06]:SJW0 0 : Synchronization jump width, Bit0 */ |
---|
| 800 | /* SJW = 2 -> 3 Tq clock cycles */ |
---|
| 801 | /* [05]:BRP5 0 : Baud Rate Prescaler, Bit 5 */ |
---|
| 802 | /* [04]:BRP4 0 : Baud Rate Prescaler, Bit 4 */ |
---|
| 803 | /* [03]:BRP3 0 : Baud Rate Prescaler, Bit 3 */ |
---|
| 804 | /* [02]:BRP2 1 : Baud Rate Prescaler, Bit 2 */ |
---|
| 805 | /* [01]:BRP1 0 : Baud Rate Prescaler, Bit 1 */ |
---|
| 806 | /* [00]:BRP0 1 : Baud Rate Prescaler, Bit 0 */ |
---|
[c9b005a9] | 807 | mscan->btr0 = (BTR0_SJW(sseg-1) | BTR0_BRP(prescale_val-1)); |
---|
[ca680bc5] | 808 | |
---|
| 809 | /* Bus Timing Register 1 MSCAN_A/_B ------------------------------*/ |
---|
| 810 | /* [07]:SAMP 0 : One Sample per bit */ |
---|
| 811 | /* [06]:TSEG22 0 : Time Segment 2, Bit 2 */ |
---|
| 812 | /* [05]:TSEG21 1 : Time Segment 2, Bit 1 */ |
---|
| 813 | /* [04]:TSEG20 0 : Time Segment 2, Bit 0 */ |
---|
| 814 | /* -> PHASE_SEG2 = 3 Tq */ |
---|
| 815 | /* [03]:TSEG13 0 : Time Segment 1, Bit 3 */ |
---|
| 816 | /* [02]:TSEG12 1 : Time Segment 1, Bit 2 */ |
---|
| 817 | /* [01]:TSEG11 1 : Time Segment 1, Bit 1 */ |
---|
| 818 | /* [00]:TSEG10 0 : Time Segment 1, Bit 0 */ |
---|
[c9b005a9] | 819 | mscan->btr1 = (BTR1_TSEG_22_20(tseg_2-1) | BTR1_TSEG_13_10(tseg_1-1)); |
---|
[ca680bc5] | 820 | |
---|
| 821 | return; |
---|
| 822 | |
---|
| 823 | } |
---|
| 824 | |
---|
| 825 | |
---|
| 826 | /* |
---|
| 827 | * MPC5x00 MSCAN perform settings in init mode |
---|
| 828 | */ |
---|
| 829 | void mpc5200_mscan_perform_init_mode_settings(volatile struct mpc5200_mscan *mscan) |
---|
| 830 | { |
---|
[c9b005a9] | 831 | |
---|
| 832 | /* perform all can bit time settings */ |
---|
| 833 | mpc5200_mscan_perform_bit_time_settings(mscan,CAN_BIT_RATE,IPB_CLOCK); |
---|
| 834 | |
---|
[ca680bc5] | 835 | /* Control Register 1 --------------------------------------------*/ |
---|
| 836 | /* [07]:CANE 0 : MSCAN Module is disabled */ |
---|
| 837 | /* [06]:CLKSRC 0 : Clock Source -> IPB_CLOCK (bsp.h) */ |
---|
| 838 | /* [05]:LOOPB 0 : No Loopback */ |
---|
| 839 | /* [04]:LISTEN 0 : Normal Operation */ |
---|
| 840 | /* [03]:res 0 : reserved */ |
---|
| 841 | /* [02]:WUPM 0 : No protect. from spurious WakeUp */ |
---|
| 842 | /* [01]:SLPAK 1->0 : Sleep Mode Acknowledge (rd. only) */ |
---|
| 843 | /* [00]:INITAK 0 : Init. Mode Acknowledge (rd. only) */ |
---|
| 844 | /* Set CLK source, disable loopback & listen-only mode */ |
---|
| 845 | #ifndef MSCAN_LOOPBACK |
---|
| 846 | mscan->ctl1 &= ~(CTL1_LISTEN | CTL1_LOOPB | CTL1_CLKSRC); |
---|
| 847 | #else |
---|
| 848 | mscan->ctl1 &= ~(CTL1_LISTEN | CTL1_CLKSRC); |
---|
| 849 | mscan->ctl1 |= (CTL1_LOOPB); |
---|
| 850 | #endif |
---|
| 851 | |
---|
| 852 | /* IPB clock -> IPB_CLOCK (bsp.h) */ |
---|
| 853 | /* bitrate -> CAN_BIT_RATE (mscan.h) */ |
---|
| 854 | /* Max. no of Tq -> CAN_MAX_NO_OF_TQ (mscan.h) */ |
---|
| 855 | /* Prescaler value -> prescale_val = ROUND_UP(IPB_CLOCK/(CAN_BIT_RATE * CAN_MAX_NO_OF_TQ)) */ |
---|
| 856 | /* SYNC_SEG -> 1 tq */ |
---|
| 857 | /* time segment 1 -> 16 tq (PROP_SEG+PHASE_SEG), CAN_MAX_NO_OF_TQ_TSEG1 = 15 (mscan.h) */ |
---|
| 858 | /* time segment 2 -> 8 tq (PHASE_SEG2) , CAN_MAX_NO_OF_TQ_TSEG2 = 7 (mscan.h) */ |
---|
| 859 | /* SJW -> 3 (fixed 0...3) , CAN_MAX_NO_OF_TQ_SJW = 2 (mscan.h) */ |
---|
| 860 | |
---|
| 861 | /* ID Acceptance Control MSCAN_A/_B ------------------------------*/ |
---|
| 862 | /* [07]:res. 0 : reserved */ |
---|
| 863 | /* [06]:res. 0 : reserved */ |
---|
| 864 | /* [05]:IDAM1 0 : ID acceptance control, Bit1 */ |
---|
| 865 | /* [04]:IDAM0 1 : ID acceptance control, Bit0 */ |
---|
| 866 | /* -> filter 16 bit mode */ |
---|
| 867 | /* [03]:res. 0 : reserved */ |
---|
| 868 | /* [02]:IDHIT2 0 : ID acceptance hit indication, Bit 2 */ |
---|
| 869 | /* [01]:IDHIT1 0 : ID acceptance hit indication, Bit 1 */ |
---|
| 870 | /* [00]:IDHIT0 0 : ID acceptance hit indication, Bit 0 */ |
---|
| 871 | mscan->idac &= ~(IDAC_IDAM1); |
---|
| 872 | mscan->idac |= (IDAC_IDAM0); |
---|
| 873 | |
---|
[c9b005a9] | 874 | /* initialize rx filter masks (16 bit) */ |
---|
| 875 | mscan->idmr0 = SET_IDMR0(0x07FF); |
---|
| 876 | mscan->idmr1 = SET_IDMR1(0x07FF); |
---|
| 877 | mscan->idmr2 = SET_IDMR2(0x07FF); |
---|
| 878 | mscan->idmr3 = SET_IDMR3(0x07FF); |
---|
| 879 | mscan->idmr4 = SET_IDMR4(0x07FF); |
---|
| 880 | mscan->idmr5 = SET_IDMR5(0x07FF); |
---|
| 881 | mscan->idmr6 = SET_IDMR6(0x07FF); |
---|
| 882 | mscan->idmr7 = SET_IDMR7(0x07FF); |
---|
[ca680bc5] | 883 | |
---|
| 884 | /* Control Register 1 --------------------------------------------*/ |
---|
| 885 | /* [07]:CANE 0->1 : MSCAN Module is enabled */ |
---|
| 886 | /* [06]:CLKSRC 1 : Clock Source -> IPB_CLOCK (bsp.h) */ |
---|
| 887 | /* [05]:LOOPB 0 : No Loopback */ |
---|
| 888 | /* [04]:LISTEN 0 : Normal Operation */ |
---|
| 889 | /* [03]:res 0 : reserved */ |
---|
| 890 | /* [02]:WUPM 0 : No protect. from spurious WakeUp */ |
---|
| 891 | /* [01]:SLPAK 0 : Sleep Mode Acknowledge (rd. only) */ |
---|
| 892 | /* [00]:INITAK 0 : Init. Mode Acknowledge (rd. only) */ |
---|
| 893 | /* enable MSCAN A_/_B */ |
---|
| 894 | mscan->ctl1 |= (CTL1_CANE); |
---|
| 895 | |
---|
| 896 | return; |
---|
| 897 | |
---|
| 898 | } |
---|
| 899 | |
---|
| 900 | |
---|
| 901 | /* |
---|
| 902 | * MPC5x00 MSCAN perform settings in normal mode |
---|
| 903 | */ |
---|
| 904 | void mpc5200_mscan_perform_normal_mode_settings(volatile struct mpc5200_mscan *mscan) |
---|
| 905 | { |
---|
| 906 | |
---|
| 907 | /* Control Register 0 --------------------------------------------*/ |
---|
| 908 | /* [07]:RXFRM 0 : Recv. Frame, Flag Bit (rd.&clear only) */ |
---|
| 909 | /* [06]:RXACT 0 : Recv. Active, Status Bit (rd. only) */ |
---|
| 910 | /* [05]:CSWAI 0 : CAN Stops in Wait Mode */ |
---|
| 911 | /* [04]:SYNCH 0 : Synchronized, Status Bit (rd. only) */ |
---|
| 912 | /* [03]:TIME 1 : Generate Timestamps */ |
---|
| 913 | /* [02]:WUPE 0 : WakeUp Disabled */ |
---|
| 914 | /* [01]:SLPRQ 0 : No Sleep Mode Request */ |
---|
| 915 | /* [00]:INITRQ 0 : No init. Mode Request */ |
---|
| 916 | /* Disable wait mode, enable timestamps */ |
---|
| 917 | mscan->ctl0 &= ~(CTL0_CSWAI); |
---|
| 918 | mscan->ctl0 |= (CTL0_TIME); |
---|
| 919 | |
---|
| 920 | return; |
---|
| 921 | |
---|
| 922 | } |
---|
| 923 | |
---|
| 924 | rtems_status_code mpc5200_mscan_set_mode(rtems_device_minor_number minor, uint8_t mode) |
---|
| 925 | { |
---|
| 926 | struct mscan_channel_info *chan = NULL; |
---|
| 927 | volatile struct mpc5200_mscan *mscan = NULL; |
---|
| 928 | |
---|
| 929 | switch(minor) |
---|
| 930 | { |
---|
| 931 | |
---|
| 932 | case MSCAN_A: |
---|
| 933 | case MSCAN_B: |
---|
| 934 | chan = &chan_info[minor]; |
---|
| 935 | mscan = chan->regs; |
---|
| 936 | break; |
---|
| 937 | |
---|
| 938 | default: |
---|
| 939 | return RTEMS_UNSATISFIED; |
---|
| 940 | break; |
---|
| 941 | } |
---|
| 942 | |
---|
| 943 | if(chan->mode == mode) |
---|
| 944 | return RTEMS_SUCCESSFUL; |
---|
| 945 | |
---|
| 946 | switch(mode) |
---|
| 947 | { |
---|
| 948 | |
---|
[c9b005a9] | 949 | case MSCAN_INIT_NORMAL_MODE: |
---|
| 950 | /* if not already set enter init mode */ |
---|
| 951 | mpc5200_mscan_enter_init_mode(mscan); |
---|
| 952 | /* perform initialization which has to be done in init mode */ |
---|
| 953 | mpc5200_mscan_perform_init_mode_settings(mscan); |
---|
| 954 | break; |
---|
| 955 | |
---|
[ca680bc5] | 956 | case MSCAN_NORMAL_MODE: |
---|
| 957 | /* if not already set enter init mode */ |
---|
| 958 | mpc5200_mscan_enter_init_mode(mscan); |
---|
| 959 | |
---|
| 960 | if((chan->mode) == MSCAN_INITIALIZED_MODE) |
---|
[c9b005a9] | 961 | { |
---|
| 962 | |
---|
[ca680bc5] | 963 | /* perform initialization which has to be done in init mode */ |
---|
| 964 | mpc5200_mscan_perform_init_mode_settings(mscan); |
---|
[c9b005a9] | 965 | } |
---|
| 966 | |
---|
| 967 | if((chan->mode) == MSCAN_SLEEP_MODE) |
---|
| 968 | { |
---|
| 969 | |
---|
[ca680bc5] | 970 | /* exit sleep mode */ |
---|
| 971 | mpc5200_mscan_exit_sleep_mode(mscan); |
---|
[c9b005a9] | 972 | } |
---|
[ca680bc5] | 973 | |
---|
[c9b005a9] | 974 | /* exit init mode */ |
---|
[ca680bc5] | 975 | mpc5200_mscan_exit_init_mode(mscan); |
---|
| 976 | /* enable ints. */ |
---|
| 977 | mpc5200_mscan_int_enable(mscan); |
---|
| 978 | /* wait for bus sync. */ |
---|
| 979 | mpc5200_mscan_wait_sync(mscan); |
---|
| 980 | break; |
---|
| 981 | |
---|
| 982 | case MSCAN_SLEEP_MODE: |
---|
[c9b005a9] | 983 | /* disable ints. */ |
---|
[ca680bc5] | 984 | mpc5200_mscan_int_disable(mscan); |
---|
| 985 | /* exit sleep mode */ |
---|
| 986 | mpc5200_mscan_enter_sleep_mode(mscan); |
---|
| 987 | break; |
---|
| 988 | |
---|
| 989 | default: |
---|
| 990 | return RTEMS_UNSATISFIED; |
---|
| 991 | break; |
---|
| 992 | |
---|
| 993 | } |
---|
| 994 | |
---|
| 995 | /* set new channel mode */ |
---|
| 996 | chan->mode = mode; |
---|
| 997 | |
---|
| 998 | return RTEMS_SUCCESSFUL; |
---|
| 999 | |
---|
| 1000 | } |
---|
| 1001 | |
---|
| 1002 | |
---|
| 1003 | /* |
---|
| 1004 | * initialization of channel info. |
---|
| 1005 | */ |
---|
| 1006 | rtems_status_code mscan_channel_initialize(rtems_device_major_number major, rtems_device_minor_number minor) |
---|
| 1007 | { |
---|
| 1008 | rtems_status_code status; |
---|
| 1009 | struct mscan_channel_info *chan = &chan_info[minor]; |
---|
| 1010 | |
---|
[c9b005a9] | 1011 | |
---|
[ca680bc5] | 1012 | /* set registers according to MSCAN channel information */ |
---|
| 1013 | switch(minor) |
---|
| 1014 | { |
---|
| 1015 | |
---|
| 1016 | case MSCAN_A: |
---|
| 1017 | chan->rx_qname = rtems_build_name ('C', 'N', 'A', 'Q'); |
---|
[c9b005a9] | 1018 | chan->tx_rb_sname = rtems_build_name ('C', 'N', 'A', 'S'); |
---|
[ca680bc5] | 1019 | |
---|
| 1020 | /* register RTEMS device names for MSCAN A */ |
---|
[c9b005a9] | 1021 | if((status = rtems_io_register_name (MSCAN_A_DEV_NAME, major, MSCAN_A)) != RTEMS_SUCCESSFUL) |
---|
| 1022 | return status; |
---|
| 1023 | |
---|
| 1024 | /* register RTEMS device names for MSCAN 0 */ |
---|
| 1025 | if((status = rtems_io_register_name (MSCAN_0_DEV_NAME, major, MSCAN_A)) != RTEMS_SUCCESSFUL) |
---|
[ca680bc5] | 1026 | return status; |
---|
| 1027 | |
---|
[c9b005a9] | 1028 | /* allocate the space for MSCAN A tx ring buffer */ |
---|
| 1029 | if(((chan->tx_ring_buf.buf_ptr) = malloc(sizeof(struct can_message)*(NO_OF_MSCAN_TX_BUFF+1))) != NULL) |
---|
| 1030 | { |
---|
| 1031 | chan->tx_ring_buf.head_ptr = chan->tx_ring_buf.tail_ptr = chan->tx_ring_buf.buf_ptr; |
---|
| 1032 | } |
---|
| 1033 | else |
---|
| 1034 | { |
---|
| 1035 | return RTEMS_UNSATISFIED; |
---|
| 1036 | } |
---|
[ca680bc5] | 1037 | break; |
---|
| 1038 | |
---|
| 1039 | case MSCAN_B: |
---|
| 1040 | chan->rx_qname = rtems_build_name ('C', 'N', 'B', 'Q'); |
---|
[c9b005a9] | 1041 | chan->tx_rb_sname = rtems_build_name ('C', 'N', 'B', 'S'); |
---|
[ca680bc5] | 1042 | |
---|
| 1043 | /* register RTEMS device names for MSCAN B */ |
---|
| 1044 | if((status = rtems_io_register_name (MSCAN_B_DEV_NAME, major, MSCAN_B)) != RTEMS_SUCCESSFUL) |
---|
| 1045 | return status; |
---|
| 1046 | |
---|
[c9b005a9] | 1047 | /* register RTEMS device names for MSCAN 1 */ |
---|
| 1048 | if((status = rtems_io_register_name (MSCAN_1_DEV_NAME, major, MSCAN_B)) != RTEMS_SUCCESSFUL) |
---|
| 1049 | return status; |
---|
| 1050 | |
---|
| 1051 | /* allocate the space for MSCAN B tx ring buffer */ |
---|
| 1052 | if(((chan->tx_ring_buf.buf_ptr) = malloc(sizeof(struct can_message)*(NO_OF_MSCAN_TX_BUFF+1))) != NULL) |
---|
| 1053 | { |
---|
| 1054 | chan->tx_ring_buf.head_ptr = chan->tx_ring_buf.tail_ptr = chan->tx_ring_buf.buf_ptr; |
---|
| 1055 | } |
---|
| 1056 | else |
---|
| 1057 | { |
---|
| 1058 | return RTEMS_UNSATISFIED; |
---|
| 1059 | } |
---|
[ca680bc5] | 1060 | break; |
---|
| 1061 | |
---|
| 1062 | default: |
---|
| 1063 | return RTEMS_UNSATISFIED; |
---|
| 1064 | break; |
---|
| 1065 | } |
---|
| 1066 | |
---|
[c9b005a9] | 1067 | /* create RTEMS rx message queue */ |
---|
| 1068 | status = rtems_message_queue_create(chan->rx_qname, |
---|
| 1069 | (uint32_t) NO_OF_MSCAN_RX_BUFF, |
---|
| 1070 | (uint32_t) MSCAN_MESSAGE_SIZE(sizeof(struct can_message)), |
---|
| 1071 | (rtems_attribute) RTEMS_LOCAL | RTEMS_FIFO, |
---|
| 1072 | (rtems_id *)&(chan->rx_qid)); |
---|
| 1073 | |
---|
| 1074 | /* create counting RTEMS tx ring buffer semaphore */ |
---|
| 1075 | status = rtems_semaphore_create(chan->tx_rb_sname, |
---|
| 1076 | (uint32_t)(NO_OF_MSCAN_TX_BUFF), |
---|
| 1077 | RTEMS_COUNTING_SEMAPHORE | RTEMS_NO_INHERIT_PRIORITY | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL, |
---|
| 1078 | (rtems_task_priority)0, |
---|
| 1079 | (rtems_id *)&(chan->tx_rb_sid)); |
---|
| 1080 | |
---|
| 1081 | /* Set up interrupts */ |
---|
[ca680bc5] | 1082 | if(!BSP_install_rtems_irq_handler(&(mpc5200_mscan_irq_data[minor]))) |
---|
| 1083 | rtems_panic("Can't attach MPC5x00 MSCAN interrupt handler %d\n", minor); |
---|
| 1084 | |
---|
| 1085 | /* basic setup for channel info. struct. */ |
---|
[c9b005a9] | 1086 | chan->regs = (struct mpc5200_mscan *)&(mpc5200.mscan[minor]); |
---|
| 1087 | chan->int_rx_err = 0; |
---|
| 1088 | chan->id_extended = FALSE; |
---|
| 1089 | chan->mode = MSCAN_INITIALIZED_MODE; |
---|
| 1090 | chan->tx_buf_no = NO_OF_MSCAN_TX_BUFF; |
---|
[ca680bc5] | 1091 | |
---|
| 1092 | return status; |
---|
| 1093 | |
---|
| 1094 | } |
---|
| 1095 | |
---|
| 1096 | |
---|
| 1097 | /* |
---|
| 1098 | * MPC5x00 MSCAN device initialization |
---|
| 1099 | */ |
---|
| 1100 | rtems_device_driver mscan_initialize(rtems_device_major_number major, |
---|
| 1101 | rtems_device_minor_number minor, |
---|
| 1102 | void *arg |
---|
| 1103 | ) |
---|
| 1104 | { |
---|
| 1105 | rtems_status_code status; |
---|
| 1106 | |
---|
| 1107 | /* Initialization requested via RTEMS */ |
---|
| 1108 | if((status = mscan_channel_initialize(major,MSCAN_A)) != RTEMS_SUCCESSFUL) |
---|
| 1109 | rtems_fatal_error_occurred(status); |
---|
| 1110 | |
---|
| 1111 | if((status = mscan_channel_initialize(major,MSCAN_B)) != RTEMS_SUCCESSFUL) |
---|
| 1112 | rtems_fatal_error_occurred(status); |
---|
| 1113 | |
---|
[c9b005a9] | 1114 | if((status = mpc5200_mscan_set_mode(MSCAN_A, MSCAN_INIT_NORMAL_MODE)) != RTEMS_SUCCESSFUL) |
---|
[ca680bc5] | 1115 | rtems_fatal_error_occurred(status); |
---|
| 1116 | |
---|
[c9b005a9] | 1117 | if((status = mpc5200_mscan_set_mode(MSCAN_B, MSCAN_INIT_NORMAL_MODE)) != RTEMS_SUCCESSFUL) |
---|
[ca680bc5] | 1118 | rtems_fatal_error_occurred(status); |
---|
| 1119 | |
---|
| 1120 | return status; |
---|
| 1121 | |
---|
| 1122 | } |
---|
| 1123 | |
---|
| 1124 | |
---|
| 1125 | /* |
---|
| 1126 | * MPC5x00 MSCAN device open |
---|
| 1127 | */ |
---|
| 1128 | rtems_device_driver mscan_open( rtems_device_major_number major, |
---|
| 1129 | rtems_device_minor_number minor, |
---|
| 1130 | void * arg |
---|
| 1131 | ) |
---|
| 1132 | { |
---|
[c9b005a9] | 1133 | rtems_status_code status = RTEMS_SUCCESSFUL; |
---|
[ca680bc5] | 1134 | struct mscan_channel_info *chan = NULL; |
---|
| 1135 | |
---|
| 1136 | switch(minor) |
---|
| 1137 | { |
---|
| 1138 | |
---|
| 1139 | case MSCAN_A: |
---|
| 1140 | case MSCAN_B: |
---|
| 1141 | chan = &chan_info[minor]; |
---|
| 1142 | break; |
---|
| 1143 | |
---|
| 1144 | default: |
---|
| 1145 | return RTEMS_UNSATISFIED; |
---|
| 1146 | break; |
---|
| 1147 | } |
---|
| 1148 | |
---|
[c9b005a9] | 1149 | |
---|
| 1150 | /* check mode */ |
---|
| 1151 | if((chan->mode) == MSCAN_SLEEP_MODE) |
---|
| 1152 | { |
---|
| 1153 | |
---|
| 1154 | /* if not already set enter init mode */ |
---|
| 1155 | status = mpc5200_mscan_set_mode(minor, MSCAN_NORMAL_MODE); |
---|
| 1156 | } |
---|
[ca680bc5] | 1157 | |
---|
| 1158 | return status; |
---|
| 1159 | |
---|
| 1160 | } |
---|
| 1161 | |
---|
| 1162 | |
---|
| 1163 | /* |
---|
| 1164 | * MPC5x00 MSCAN device close |
---|
| 1165 | */ |
---|
| 1166 | rtems_device_driver mscan_close( rtems_device_major_number major, |
---|
| 1167 | rtems_device_minor_number minor, |
---|
| 1168 | void * arg |
---|
| 1169 | ) |
---|
| 1170 | { |
---|
| 1171 | rtems_status_code status; |
---|
| 1172 | struct mscan_channel_info *chan = NULL; |
---|
| 1173 | |
---|
| 1174 | switch(minor) |
---|
| 1175 | { |
---|
| 1176 | |
---|
| 1177 | case MSCAN_A: |
---|
| 1178 | case MSCAN_B: |
---|
| 1179 | chan = &chan_info[minor]; |
---|
| 1180 | break; |
---|
| 1181 | |
---|
| 1182 | default: |
---|
| 1183 | return RTEMS_UNSATISFIED; |
---|
| 1184 | break; |
---|
| 1185 | } |
---|
| 1186 | |
---|
| 1187 | /* enter deep sleep mode */ |
---|
| 1188 | status = mpc5200_mscan_set_mode(minor, MSCAN_SLEEP_MODE); |
---|
| 1189 | |
---|
| 1190 | return status; |
---|
| 1191 | |
---|
| 1192 | } |
---|
| 1193 | |
---|
| 1194 | |
---|
| 1195 | /* |
---|
| 1196 | * MPC5x00 MSCAN device read |
---|
| 1197 | */ |
---|
| 1198 | rtems_device_driver mscan_read( rtems_device_major_number major, |
---|
| 1199 | rtems_device_minor_number minor, |
---|
| 1200 | void * arg |
---|
| 1201 | ) |
---|
| 1202 | { |
---|
| 1203 | rtems_status_code status; |
---|
| 1204 | uint32_t message_size = 0; |
---|
| 1205 | rtems_libio_rw_args_t *parms = (rtems_libio_rw_args_t *)arg; |
---|
| 1206 | struct mscan_rx_parms *rx_parms = (struct mscan_rx_parms *)(parms->buffer); |
---|
| 1207 | struct can_message *rx_mess = (struct can_message *)(rx_parms->rx_mess); |
---|
| 1208 | struct mscan_channel_info *chan = NULL; |
---|
| 1209 | |
---|
| 1210 | switch(minor) |
---|
| 1211 | { |
---|
| 1212 | |
---|
| 1213 | case MSCAN_A: |
---|
| 1214 | case MSCAN_B: |
---|
| 1215 | chan = &chan_info[minor]; |
---|
| 1216 | break; |
---|
| 1217 | |
---|
| 1218 | default: |
---|
| 1219 | return RTEMS_UNSATISFIED; |
---|
| 1220 | break; |
---|
| 1221 | } |
---|
| 1222 | |
---|
[c9b005a9] | 1223 | |
---|
| 1224 | /* end init mode if it is first read */ |
---|
| 1225 | if((chan->mode) == MSCAN_INIT_NORMAL_MODE) |
---|
| 1226 | { |
---|
| 1227 | |
---|
| 1228 | /* if not already set enter init mode */ |
---|
| 1229 | mpc5200_mscan_set_mode(minor, MSCAN_NORMAL_MODE); |
---|
| 1230 | } |
---|
| 1231 | |
---|
[ca680bc5] | 1232 | if((status = rtems_message_queue_receive(chan->rx_qid, |
---|
| 1233 | (void *)(rx_mess), |
---|
| 1234 | (uint32_t *)&message_size, |
---|
| 1235 | (uint32_t)(rx_parms->rx_flags), |
---|
| 1236 | (rtems_interval)(rx_parms->rx_timeout))) |
---|
| 1237 | != RTEMS_SUCCESSFUL) |
---|
| 1238 | { |
---|
| 1239 | |
---|
| 1240 | parms->bytes_moved = 0; |
---|
| 1241 | |
---|
| 1242 | } |
---|
| 1243 | else |
---|
| 1244 | { |
---|
| 1245 | |
---|
| 1246 | parms->bytes_moved = sizeof(struct can_message); |
---|
| 1247 | |
---|
| 1248 | } |
---|
| 1249 | |
---|
| 1250 | return status; |
---|
| 1251 | |
---|
| 1252 | } |
---|
| 1253 | |
---|
| 1254 | |
---|
| 1255 | /* |
---|
| 1256 | * MPC5x00 MSCAN device write |
---|
| 1257 | */ |
---|
| 1258 | rtems_device_driver mscan_write( rtems_device_major_number major, |
---|
| 1259 | rtems_device_minor_number minor, |
---|
| 1260 | void * arg |
---|
| 1261 | ) |
---|
| 1262 | { |
---|
[c9b005a9] | 1263 | rtems_status_code status; |
---|
| 1264 | rtems_libio_rw_args_t *parms = (rtems_libio_rw_args_t *)arg; |
---|
| 1265 | struct mscan_tx_parms *tx_parms = (struct mscan_tx_parms *)(parms->buffer); |
---|
| 1266 | struct can_message *tx_mess = (struct can_message *)(tx_parms->tx_mess); |
---|
| 1267 | struct mscan_channel_info *chan = NULL; |
---|
| 1268 | mscan_handle *mscan_hdl = NULL; |
---|
| 1269 | volatile struct mpc5200_mscan *mscan = NULL; |
---|
[ca680bc5] | 1270 | |
---|
| 1271 | switch(minor) |
---|
| 1272 | { |
---|
| 1273 | case MSCAN_A: |
---|
| 1274 | case MSCAN_B: |
---|
| 1275 | chan = &chan_info[minor]; |
---|
| 1276 | mscan_hdl = mpc5200_mscan_irq_data[minor].handle; |
---|
| 1277 | mscan = chan->regs; |
---|
| 1278 | break; |
---|
| 1279 | |
---|
| 1280 | default: |
---|
| 1281 | return RTEMS_UNSATISFIED; |
---|
| 1282 | break; |
---|
| 1283 | } |
---|
| 1284 | |
---|
[c9b005a9] | 1285 | /* end init mode if it is first write */ |
---|
| 1286 | if((chan->mode) == MSCAN_INIT_NORMAL_MODE) |
---|
[ca680bc5] | 1287 | { |
---|
| 1288 | |
---|
[c9b005a9] | 1289 | /* if not already set enter init mode */ |
---|
| 1290 | mpc5200_mscan_set_mode(minor, MSCAN_NORMAL_MODE); |
---|
[ca680bc5] | 1291 | } |
---|
| 1292 | |
---|
[c9b005a9] | 1293 | /* preset moved bytes */ |
---|
| 1294 | parms->bytes_moved = 0; |
---|
[ca680bc5] | 1295 | |
---|
[c9b005a9] | 1296 | /* obtain counting semaphore of tx ring buffer */ |
---|
| 1297 | if((status = rtems_semaphore_obtain((rtems_id)(chan->tx_rb_sid), |
---|
| 1298 | RTEMS_NO_WAIT, |
---|
| 1299 | (rtems_interval)0)) |
---|
| 1300 | == RTEMS_SUCCESSFUL) |
---|
[ca680bc5] | 1301 | { |
---|
| 1302 | |
---|
[c9b005a9] | 1303 | /* append the TOUCAN tx_id to the mess. due to interrupt handling */ |
---|
| 1304 | tx_mess->toucan_tx_id = tx_parms->tx_id; |
---|
[ca680bc5] | 1305 | |
---|
[c9b005a9] | 1306 | /* fill the tx ring buffer with the message */ |
---|
| 1307 | fill_tx_buffer(chan, tx_mess); |
---|
[ca680bc5] | 1308 | |
---|
[c9b005a9] | 1309 | /* enable message buffer specific interrupt */ |
---|
| 1310 | mscan->tier |= (TIER_TXEI0 | TIER_TXEI1 | TIER_TXEI2); |
---|
[ca680bc5] | 1311 | |
---|
[c9b005a9] | 1312 | /* calculate moved bytes */ |
---|
| 1313 | parms->bytes_moved = (tx_mess->mess_len) & 0x000F; |
---|
[ca680bc5] | 1314 | |
---|
| 1315 | } |
---|
| 1316 | |
---|
[c9b005a9] | 1317 | return status; |
---|
[ca680bc5] | 1318 | |
---|
| 1319 | } |
---|
| 1320 | |
---|
| 1321 | |
---|
| 1322 | /* |
---|
| 1323 | * MPC5x00 MSCAN device control |
---|
| 1324 | */ |
---|
| 1325 | rtems_device_driver mscan_control( rtems_device_major_number major, |
---|
| 1326 | rtems_device_minor_number minor, |
---|
| 1327 | void * arg |
---|
| 1328 | ) |
---|
| 1329 | { |
---|
[c9b005a9] | 1330 | rtems_status_code status; |
---|
[ca680bc5] | 1331 | uint16_t tx_id; |
---|
[c9b005a9] | 1332 | rtems_libio_ioctl_args_t *parms = (rtems_libio_ioctl_args_t *)arg; |
---|
| 1333 | struct mscan_ctrl_parms *ctrl_parms = (struct mscan_ctrl_parms *)(parms->buffer); |
---|
| 1334 | struct mscan_channel_info *chan = NULL; |
---|
| 1335 | mscan_handle *mscan_hdl = NULL; |
---|
| 1336 | volatile struct mpc5200_mscan *mscan = NULL; |
---|
| 1337 | uint8_t tx_buf_count = 0; |
---|
[ca680bc5] | 1338 | |
---|
| 1339 | switch(minor) |
---|
| 1340 | { |
---|
| 1341 | |
---|
| 1342 | case MSCAN_A: |
---|
| 1343 | case MSCAN_B: |
---|
| 1344 | chan = &chan_info[minor]; |
---|
| 1345 | mscan_hdl = mpc5200_mscan_irq_data[minor].handle; |
---|
| 1346 | mscan = chan->regs; |
---|
| 1347 | break; |
---|
| 1348 | |
---|
| 1349 | default: |
---|
| 1350 | return RTEMS_UNSATISFIED; |
---|
| 1351 | break; |
---|
| 1352 | } |
---|
| 1353 | |
---|
| 1354 | switch(parms->command) |
---|
| 1355 | { |
---|
| 1356 | |
---|
| 1357 | /* TOUCAN callback initialization for MSCAN */ |
---|
| 1358 | case TOUCAN_MSCAN_INIT: |
---|
| 1359 | mscan_hdl->toucan_callback = ctrl_parms->toucan_cb_fnc; |
---|
| 1360 | break; |
---|
| 1361 | |
---|
| 1362 | /* set rx buffer ID */ |
---|
| 1363 | case MSCAN_SET_RX_ID: |
---|
| 1364 | |
---|
| 1365 | /* enter init mode */ |
---|
| 1366 | mpc5200_mscan_enter_init_mode(mscan); |
---|
| 1367 | |
---|
| 1368 | switch(ctrl_parms->ctrl_reg_no) |
---|
| 1369 | { |
---|
| 1370 | |
---|
| 1371 | case RX_BUFFER_0: |
---|
| 1372 | mscan->idar0 = SET_IDR0(ctrl_parms->ctrl_id); |
---|
| 1373 | mscan->idar1 = SET_IDR1(ctrl_parms->ctrl_id); |
---|
| 1374 | break; |
---|
| 1375 | |
---|
| 1376 | case RX_BUFFER_1: |
---|
| 1377 | mscan->idar2 = SET_IDR2(ctrl_parms->ctrl_id); |
---|
| 1378 | mscan->idar3 = SET_IDR3(ctrl_parms->ctrl_id); |
---|
| 1379 | break; |
---|
| 1380 | |
---|
| 1381 | case RX_BUFFER_2: |
---|
| 1382 | mscan->idar4 = SET_IDR4(ctrl_parms->ctrl_id); |
---|
| 1383 | mscan->idar5 = SET_IDR5(ctrl_parms->ctrl_id); |
---|
| 1384 | break; |
---|
| 1385 | |
---|
| 1386 | case RX_BUFFER_3: |
---|
| 1387 | mscan->idar6 = SET_IDR6(ctrl_parms->ctrl_id); |
---|
| 1388 | mscan->idar7 = SET_IDR7(ctrl_parms->ctrl_id); |
---|
| 1389 | break; |
---|
| 1390 | |
---|
| 1391 | default: |
---|
| 1392 | break; |
---|
| 1393 | |
---|
| 1394 | } |
---|
| 1395 | |
---|
| 1396 | /* exit init mode and perform further initialization which is required in the normal mode */ |
---|
| 1397 | mpc5200_mscan_exit_init_mode(mscan); |
---|
| 1398 | |
---|
| 1399 | /* enable ints. */ |
---|
| 1400 | mpc5200_mscan_int_enable(mscan); |
---|
| 1401 | |
---|
| 1402 | /* wait for bus sync. */ |
---|
| 1403 | mpc5200_mscan_wait_sync(mscan); |
---|
| 1404 | |
---|
| 1405 | return RTEMS_SUCCESSFUL; |
---|
| 1406 | break; |
---|
| 1407 | |
---|
| 1408 | /* get rx buffer ID */ |
---|
| 1409 | case MSCAN_GET_RX_ID: |
---|
| 1410 | |
---|
| 1411 | switch(ctrl_parms->ctrl_reg_no) |
---|
| 1412 | { |
---|
| 1413 | |
---|
| 1414 | case RX_BUFFER_0: |
---|
| 1415 | ctrl_parms->ctrl_id = GET_IDR0(mscan->idar0) | GET_IDR1(mscan->idar1); |
---|
| 1416 | break; |
---|
| 1417 | |
---|
| 1418 | case RX_BUFFER_1: |
---|
| 1419 | ctrl_parms->ctrl_id = GET_IDR2(mscan->idar2) | GET_IDR3(mscan->idar3); |
---|
| 1420 | break; |
---|
| 1421 | |
---|
| 1422 | case RX_BUFFER_2: |
---|
| 1423 | ctrl_parms->ctrl_id = GET_IDR4(mscan->idar4) | GET_IDR5(mscan->idar5); |
---|
| 1424 | break; |
---|
| 1425 | |
---|
| 1426 | case RX_BUFFER_3: |
---|
| 1427 | ctrl_parms->ctrl_id = GET_IDR6(mscan->idar6) | GET_IDR7(mscan->idar7); |
---|
| 1428 | break; |
---|
| 1429 | |
---|
| 1430 | default: |
---|
| 1431 | break; |
---|
| 1432 | |
---|
| 1433 | } |
---|
| 1434 | |
---|
| 1435 | break; |
---|
| 1436 | |
---|
| 1437 | /* set rx buffer ID mask */ |
---|
| 1438 | case MSCAN_SET_RX_ID_MASK: |
---|
| 1439 | |
---|
| 1440 | /* enter init mode */ |
---|
| 1441 | mpc5200_mscan_enter_init_mode(mscan); |
---|
| 1442 | |
---|
| 1443 | switch(ctrl_parms->ctrl_reg_no) |
---|
| 1444 | { |
---|
| 1445 | |
---|
| 1446 | case RX_BUFFER_0: |
---|
[c9b005a9] | 1447 | mscan->idmr0 = SET_IDMR0(ctrl_parms->ctrl_id_mask); |
---|
| 1448 | mscan->idmr1 = SET_IDMR1(ctrl_parms->ctrl_id_mask); |
---|
[ca680bc5] | 1449 | break; |
---|
| 1450 | |
---|
| 1451 | case RX_BUFFER_1: |
---|
[c9b005a9] | 1452 | mscan->idmr2 = SET_IDMR2(ctrl_parms->ctrl_id_mask); |
---|
| 1453 | mscan->idmr3 = SET_IDMR3(ctrl_parms->ctrl_id_mask); |
---|
[ca680bc5] | 1454 | break; |
---|
| 1455 | |
---|
| 1456 | case RX_BUFFER_2: |
---|
[c9b005a9] | 1457 | mscan->idmr4 = SET_IDMR4(ctrl_parms->ctrl_id_mask); |
---|
| 1458 | mscan->idmr5 = SET_IDMR5(ctrl_parms->ctrl_id_mask); |
---|
[ca680bc5] | 1459 | break; |
---|
| 1460 | |
---|
| 1461 | case RX_BUFFER_3: |
---|
[c9b005a9] | 1462 | mscan->idmr6 = SET_IDMR6(ctrl_parms->ctrl_id_mask); |
---|
| 1463 | mscan->idmr7 = SET_IDMR7(ctrl_parms->ctrl_id_mask); |
---|
[ca680bc5] | 1464 | break; |
---|
| 1465 | |
---|
| 1466 | default: |
---|
| 1467 | break; |
---|
| 1468 | |
---|
| 1469 | } |
---|
| 1470 | |
---|
| 1471 | /* exit init mode and perform further initialization which is required in the normal mode */ |
---|
| 1472 | mpc5200_mscan_exit_init_mode(mscan); |
---|
| 1473 | |
---|
| 1474 | /* enable ints. */ |
---|
| 1475 | mpc5200_mscan_int_enable(mscan); |
---|
| 1476 | |
---|
| 1477 | /* wait for bus sync. */ |
---|
| 1478 | mpc5200_mscan_wait_sync(mscan); |
---|
| 1479 | |
---|
| 1480 | break; |
---|
| 1481 | |
---|
| 1482 | /* get rx buffer ID mask */ |
---|
| 1483 | case MSCAN_GET_RX_ID_MASK: |
---|
| 1484 | |
---|
| 1485 | switch(ctrl_parms->ctrl_reg_no) |
---|
| 1486 | { |
---|
| 1487 | |
---|
| 1488 | case RX_BUFFER_0: |
---|
[c9b005a9] | 1489 | ctrl_parms->ctrl_id_mask = GET_IDMR0(mscan->idmr0) | GET_IDMR1(mscan->idmr1); |
---|
[ca680bc5] | 1490 | break; |
---|
| 1491 | |
---|
| 1492 | case RX_BUFFER_1: |
---|
[c9b005a9] | 1493 | ctrl_parms->ctrl_id_mask = GET_IDMR2(mscan->idmr2) | GET_IDMR3(mscan->idmr3); |
---|
[ca680bc5] | 1494 | break; |
---|
| 1495 | |
---|
| 1496 | case RX_BUFFER_2: |
---|
[c9b005a9] | 1497 | ctrl_parms->ctrl_id_mask = GET_IDMR4(mscan->idmr4) | GET_IDMR5(mscan->idmr5); |
---|
[ca680bc5] | 1498 | break; |
---|
| 1499 | |
---|
| 1500 | case RX_BUFFER_3: |
---|
[c9b005a9] | 1501 | ctrl_parms->ctrl_id_mask = GET_IDMR6(mscan->idmr6) | GET_IDMR7(mscan->idmr7); |
---|
[ca680bc5] | 1502 | break; |
---|
| 1503 | |
---|
| 1504 | default: |
---|
| 1505 | break; |
---|
| 1506 | |
---|
| 1507 | } |
---|
| 1508 | |
---|
| 1509 | /* set tx buffer ID */ |
---|
| 1510 | case MSCAN_SET_TX_ID: |
---|
| 1511 | |
---|
| 1512 | /* check for availability of tx buffer */ |
---|
| 1513 | if(!((mscan->tflg) & (uint8_t)(ctrl_parms->ctrl_reg_no))) |
---|
| 1514 | { |
---|
| 1515 | |
---|
| 1516 | /* do abort tx buf. request */ |
---|
| 1517 | mscan->tarq = (uint8_t)(ctrl_parms->ctrl_reg_no); |
---|
| 1518 | |
---|
| 1519 | /* wait for abort tx buf. ack. */ |
---|
| 1520 | while((mscan->taak) & (uint8_t)(ctrl_parms->ctrl_reg_no)); |
---|
| 1521 | |
---|
| 1522 | } |
---|
| 1523 | |
---|
| 1524 | /* select tx buf. */ |
---|
| 1525 | mscan->bsel = (uint8_t)(ctrl_parms->ctrl_reg_no); |
---|
| 1526 | |
---|
| 1527 | /* set the tx id of selected buf. */ |
---|
| 1528 | tx_id = ctrl_parms->ctrl_id; |
---|
| 1529 | mscan->txidr0 = SET_IDR0(tx_id); |
---|
| 1530 | mscan->txidr1 = SET_IDR1(tx_id); |
---|
| 1531 | mscan->txidr2 = 0; |
---|
| 1532 | mscan->txidr3 = 0; |
---|
| 1533 | |
---|
| 1534 | break; |
---|
| 1535 | |
---|
| 1536 | /* get tx buffer ID */ |
---|
| 1537 | case MSCAN_GET_TX_ID: |
---|
| 1538 | |
---|
| 1539 | /* select tx buf. */ |
---|
| 1540 | mscan->bsel = (uint8_t)(ctrl_parms->ctrl_reg_no); |
---|
| 1541 | |
---|
| 1542 | /* get tx id. of selected buf. */ |
---|
| 1543 | ctrl_parms->ctrl_id = GET_IDR0(mscan->txidr0) | GET_IDR1(mscan->txidr1); |
---|
| 1544 | |
---|
| 1545 | break; |
---|
| 1546 | |
---|
[c9b005a9] | 1547 | /* set can bitrate */ |
---|
| 1548 | case MSCAN_SET_BAUDRATE: |
---|
| 1549 | |
---|
| 1550 | /* check bitrate settings */ |
---|
| 1551 | if(((ctrl_parms->ctrl_can_bitrate) >= CAN_BIT_RATE_MIN) && ((ctrl_parms->ctrl_can_bitrate) <= CAN_BIT_RATE_MAX)) { |
---|
| 1552 | |
---|
| 1553 | /* enter init mode */ |
---|
| 1554 | mpc5200_mscan_enter_init_mode(mscan); |
---|
| 1555 | |
---|
| 1556 | /* perform all can bit time settings */ |
---|
| 1557 | mpc5200_mscan_perform_bit_time_settings(mscan,(uint32_t)(ctrl_parms->ctrl_can_bitrate),IPB_CLOCK); |
---|
| 1558 | |
---|
| 1559 | /* exit init mode and perform further initialization which is required in the normal mode */ |
---|
| 1560 | mpc5200_mscan_exit_init_mode(mscan); |
---|
| 1561 | |
---|
| 1562 | /* enable ints. */ |
---|
| 1563 | mpc5200_mscan_int_enable(mscan); |
---|
| 1564 | |
---|
| 1565 | /* wait for bus sync. */ |
---|
| 1566 | mpc5200_mscan_wait_sync(mscan); |
---|
| 1567 | |
---|
| 1568 | return RTEMS_SUCCESSFUL; |
---|
| 1569 | } |
---|
| 1570 | else { |
---|
| 1571 | |
---|
| 1572 | return RTEMS_UNSATISFIED; |
---|
| 1573 | } |
---|
| 1574 | |
---|
| 1575 | break; |
---|
| 1576 | |
---|
| 1577 | case SET_TX_BUF_NO: |
---|
| 1578 | |
---|
| 1579 | /* check for different settings of tx ring buffer */ |
---|
| 1580 | if((tx_buf_count = chan->tx_buf_no) != (uint8_t)(ctrl_parms->ctrl_tx_buf_no)) |
---|
| 1581 | { |
---|
| 1582 | |
---|
| 1583 | /* preset the channel specific no of messages in the tx ring buffer */ |
---|
| 1584 | tx_buf_count = chan->tx_buf_no; |
---|
| 1585 | |
---|
| 1586 | /* try to obtain all of the tx ring buffers */ |
---|
| 1587 | while(tx_buf_count > 0) |
---|
| 1588 | { |
---|
| 1589 | |
---|
| 1590 | /* obtain semaphore of all tx ring buffers */ |
---|
| 1591 | if((status = rtems_semaphore_obtain((rtems_id)(chan->tx_rb_sid), |
---|
| 1592 | RTEMS_WAIT, |
---|
| 1593 | (rtems_interval)10)) |
---|
| 1594 | == RTEMS_SUCCESSFUL) |
---|
| 1595 | { |
---|
| 1596 | |
---|
| 1597 | tx_buf_count--; |
---|
| 1598 | |
---|
| 1599 | } |
---|
| 1600 | |
---|
| 1601 | } |
---|
| 1602 | |
---|
| 1603 | /* free the former tx ring buffer */ |
---|
| 1604 | free((void *)chan->tx_ring_buf.buf_ptr); |
---|
| 1605 | |
---|
| 1606 | /* allocate the tx ring buffer with new size */ |
---|
| 1607 | if(((chan->tx_ring_buf.buf_ptr) = malloc(sizeof(struct can_message)*((uint8_t)(ctrl_parms->ctrl_tx_buf_no)+1))) != NULL) |
---|
| 1608 | { |
---|
| 1609 | chan->tx_ring_buf.head_ptr = chan->tx_ring_buf.tail_ptr = chan->tx_ring_buf.buf_ptr; |
---|
| 1610 | } |
---|
| 1611 | else |
---|
| 1612 | { |
---|
| 1613 | return RTEMS_UNSATISFIED; |
---|
| 1614 | } |
---|
| 1615 | |
---|
| 1616 | /* set the new amount of tx buffers */ |
---|
| 1617 | chan->tx_buf_no = (uint8_t)(ctrl_parms->ctrl_tx_buf_no); |
---|
| 1618 | |
---|
| 1619 | /* release the semaphore of all tx ring buffers */ |
---|
| 1620 | while(tx_buf_count < chan->tx_buf_no) |
---|
| 1621 | { |
---|
| 1622 | |
---|
| 1623 | /* obtain semaphore of all tx ring buffers */ |
---|
| 1624 | rtems_semaphore_release((rtems_id)(chan->tx_rb_sid)); |
---|
| 1625 | |
---|
| 1626 | tx_buf_count++; |
---|
| 1627 | |
---|
| 1628 | } |
---|
| 1629 | |
---|
| 1630 | } |
---|
| 1631 | else |
---|
| 1632 | { |
---|
| 1633 | |
---|
| 1634 | return RTEMS_SUCCESSFUL; |
---|
| 1635 | |
---|
| 1636 | } |
---|
| 1637 | break; |
---|
| 1638 | |
---|
[ca680bc5] | 1639 | default: |
---|
| 1640 | break; |
---|
| 1641 | |
---|
| 1642 | } |
---|
| 1643 | |
---|
| 1644 | return RTEMS_SUCCESSFUL; |
---|
| 1645 | |
---|
| 1646 | } |
---|
| 1647 | |
---|